Universal Size: Our arm waterproof cast cover is an ideal fit for most adults. The diameter of the upper circle is 20.2cm and the diameter of the lower circle is 21cm, and a maximum center hole width that can stretch up to 4.7 inches/12cm, fit the majority of men and women's arm. Whether it's showers, baths, or even swimming sessions, this adjustable protector ensures your arm stays comfortably dry. Waterproof Cast Cover Arm: Plaster cast waterproof cover arm is made of PVC material, and not easy to rip or tear, environmental-friendly, reusable; Stretchy seal is made of high resilient silicone, which fits closely to the skin and prevents water ingress. Protects bandages, wounds, and injured areas from moisture and water to avoid infection. Convenient and Comfortable: Our adult long arm cast cover have a simple design and made of highly elastic and soft material, which makes it easier for blood circulation. No retaining ring, the high elastic opening mouth seal makes the waterproof adult short arm cast cover easily pulled on and off in a non-painful way. Recommend to wear it under the help from others if you are in plaster. Easy to Use: The cast cover is designed to easily stretch over the cast and then the diaphragm self-seal tightly around arm without tape or straps; Simply slip the waterproof ring over your arm then slightly pull down to form a protective waterproof seal. After each use, simply hang it to dry. Suitable for Multiple Occasions: Ideal for everyday use such as therapeutic treatments, bathing, showering and many outdoor activities. Recommend for showering and bathing while recovering from injuries, surgeries, accidents, or suffering from medical conditions such as cuts, rashes, , skin problems, wounds & scratches. Colour:As Shown Material:PVC size:Length 67cm x Width 44.5cm Upper circle diameter 20.2cm Lower circle diameter 21cm Package Contents: 1 x Waterproof Cast Cover Arm Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.